Steuerung zum Beeinflussen einer Kraftstoffpumpe

摘要

In a fuel supply system for a vehicle, provided with a fuel tank having a bottom wall having an upward convex portion dividing an interior space of the fuel tank into a first chamber and a second chamber, a discharge rate of an electric fuel pump is controlled properly to reduce power consumption and fuel consumption. A fuel level monitoring means compares an output Dm of a fuel meter unit 13 representing a level of fuel in the fuel tank with a set threshold fuel level Lj, i.e., a minimum fuel level that requires the operation of a jet pump which pumps fuel from the second chamber into the first chamber. A power supply control means controls power supply to the fuel pump to supply power necessary for driving the fuel pump for operation at a discharge rate equal to the sum of the fuel consumption of the engine and a minimum required flow rate necessary for maintaining the performance of the fuel supply system when Dm >/=Lj or for operation at a maximum discharge rate when Dm